1 2 /* 3 * Copyright (C) 2012 by Darren Reed. 4 * 5 * See the IPFILTER.LICENCE file for details on licencing. 6 * 7 * $Id$ 8 */ 9 #include "ipf.h" 10 11 12 char * 13 portname(int pr, int port) 14 { 15 static char buf[32]; 16 struct protoent *p = NULL; 17 struct servent *sv = NULL; 18 struct servent *sv1 = NULL; 19 20 if ((opts & OPT_NORESOLVE) == 0) { 21 if (pr == -1) { 22 if ((sv = getservbyport(htons(port), "tcp"))) { 23 strncpy(buf, sv->s_name, sizeof(buf)-1); 24 buf[sizeof(buf)-1] = '\0'; 25 sv1 = getservbyport(htons(port), "udp"); 26 sv = strncasecmp(buf, sv->s_name, strlen(buf)) ? 27 NULL : sv1; 28 } 29 if (sv) 30 return (buf); 31 } else if ((pr != -2) && (p = getprotobynumber(pr))) { 32 if ((sv = getservbyport(htons(port), p->p_name))) { 33 strncpy(buf, sv->s_name, sizeof(buf)-1); 34 buf[sizeof(buf)-1] = '\0'; 35 return (buf); 36 } 37 } 38 } 39 40 (void) snprintf(buf, sizeof(buf), "%d", port); 41 return (buf); 42 } 43